Telescopic connector for vehicle brake conduit

ABSTRACT

The invention concerns a connector to connect two parts of a brake conduit where the connector permits axial movement without variation of the volume of the conduit. The connector is used in the suspension fork of a motorcycle. The brake circuit is the hydraulic connection between a handle and the brake cylinder of the front wheel. The connector makes it possible to integrate the brake circuit into a leg of the fork. The variation in length is necessary to compensate the suspension movement of the fork. The invention aims at a brake circuit connector which can be mounted in the centre of the leg. Because of the permitting of axial movement without variation of the volume of the circuit the brake conduit can completely be built in. Because of the absence of hoses the brake circuit is very direct in the transmitting of the brake force. Also protruding parts are completely avoided.

[0001] The Invention concerns a connector to connect two parts of a brake conduit where the connector permits axial movement without variation of the volume of the conduit. The connector is used in the suspension fork of a motorcycle. The brake circuit is the hydraulic connection between a handle and the brake cylinder of the front wheel. The connector makes it possible to integrate the brake circuit into a leg of the fork. The variation in length is necessary to compensate the suspension movement of the fork.

[0002] The front wheel brake of a motorcycle is the most important brake element as motorcycles when braking duck to front while the pressure on the rear wheel decreases. Because the front brake is manual operated, It Is of great importance that the brake force is very exact transmitted. With known systems the hydraulic pressure Is transmitted with hoses. These have the disadvantage of being more or less flexible so the brake force Is not constant transmitted by change In volume of the hose. To compensate the suspension of the fork one needs room and in many cases the hoses stick out of the motorcycle.

[0003] The invention aims at a brake circuit connector which can be mounted in the centre of the leg. Because of the permitting of axial movement without variation of the volume of the circuit the brake conduit can completely be built in. Because of the absence of hoses the brake circuit is very direct in the transmitting of the brake force. Also protruding parts are completely avoided.

[0004] The Invention Is described with the help of the drawing.

[0005]FIG. 1 shows a crossection in length of the connector.

[0006] To enhance the clarity of the drawing shading of the two tubes is refrained.

[0007] At (1) is indicated the block with inlet connection (2) where tube (3) and tube (4) are screwed In. Tube (3) and tube (4) are sealed with seal (5) and (6). Tube (3) Is connected with seat-ring (7) with seal and tube (4) is connected with seal-ring (8) with seal. Through seal-rings (7) and (8) passes core-tube (9) which is on one side connected with connection block (10) and is sealed with seal-ring (11). At (12) is the outlet connection which is connected by borings with boring (13). core-tube (9) has boring (13) which is closed on the other side with screw (14). At (15) is in core-tube (9) a has boring (15) foreseen.

[0008] Tube (3) Is longer and wider than tube (4). The Inside of tube (3) is connected with Inlet connection (2). By the difference of length between tube (3) and (4) comes into being space (16). The length of space (16) correspond to the variation in length of the connector. By crossboring (15) space (16) is connected with boring (13).

[0009] When core-tube (9) moves axial the total volume of the brake circuit will not change because the diameter of seals in seal-ring (7) and (8) are having the same diameter. 

1. Axial variable in length connector for brake conduit characterised by that between seal-rings (7, 8) space (16) is created which is connected with inlet connection (2) and where in core-tube 06 (9) is axial moveable where cross boring (15) in core-tube (9) within the moving course is connected with space (16) where boring (13) is connected with outlet block (12).
 2. Axial variable in length connector for brake conduit as in claim 1 characterised by that space (16) is formed by core-tube (9) which is sealed and fitting in seal-rings (7. 8) in tube (3) and tube (4) and tube (3) and tube (4) which are mounted in inlet block (1), while space (16) is connected with inlet connection (2) and via core-tube (9) and cross boring (15) connected with outlet block (12). 